222021002100 has 216 divisors, whose sum is σ = 686512414560. Its totient is φ = 55245991680.

The previous prime is 222021002087. The next prime is 222021002101. The reversal of 222021002100 is 1200120222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222021002101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25582962 + ... + 25591638.

Almost surely, 2^222021002100 is an apocalyptic number.

222021002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222021002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343256207280).

222021002100 is an abundant number, since it is smaller than the sum of its proper divisors (464491412460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222021002100 is a wasteful number, since it uses less digits than its factorization.

222021002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8847 (or 8773 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222021002100 its reverse (1200120222), we get a palindrome (223221122322).

The spelling of 222021002100 in words is "two hundred twenty-two billion, twenty-one million, two thousand, one hundred".